- #1
brbrett
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Homework Statement
An atom or ion with only one electron is excited from the ground state to the first excited state (n = 2) with a photon of 1.47E-17 J of energy. What is the charge on the one-electron species?
A. 0
B. +1
C. +2
D. +3
E. +4
Homework Equations
E=-(2.18E-18)(Z2)/(N2)
The Attempt at a Solution
I plugged in the information given into the equation:
(1.47E-17)=(-2.18E-18)(Z2)((1/4)-1)
With some algebra, I got Z=2.998, which may as well be a charge of +3.
However, according to the answer key, the correct answer is, in fact, +2 (C).
I would appreciate any guidance as to where I might be going wrong with this problem. :)